Yeah, Larry pretty much summed it up correctly. I live in Warrenville, but tend to avoid traffic on my rides. The nearest "interesting" ride is along the North Shore of the lake on Sheridan Road. I can never believe the topography so close to the city. It's a slow ride and really, once you've done it, well... best to do it on an early Sunday morning with the joggers.
It usually takes me a couple hours to get to anything twisty/rolling. There are some small stretches of curves out in the corn fields of Kendall, Kane and DeKalb counties, but they're pretty short lived. There's a really nice part of Rt.71 on the southern edge of Starved Rock that's a lot of fun, but I find you have to turn around and hit it 3/4 times to make it worth the ride out there. I'll go there just to get a hotdog at Grumpy's (Rt 71 & I-80).
Just south of Princeton, IL is some nice rolling land that was formed on the western side of the Illinois river. There's also a lot of gravel roads to navigate through that kind of sour the moments. I still get out there when I can.
My favorite area, as Larry mentioned, is out around Galena, IL. Awesome roads are Blackjack and Stagecoach, with a lot of minor roads around them to seek out.
Getting out a bit further are the WI roads. Anything North and West of Monroe, WI are getting to be good rides. I seek out the cheese factories in the area. There's probably 6-8 of them around Monroe west to Darlington. The further North into Wi you go the better things get. West of Madison, along the Wisconsin River is really fun. I have to thank John from Mt. Horab for the tour he gave a few of us 2 summers ago. North of The WI river gets ever better for hilly, twisty routes. Just outside of La Crosse is a road that has the Mindoro Cut which I found to be a great ride. It was previously mentioned to check out "Rustic Roads", and another that I use is has maps
of different WI regions to ride.
Best of luck on your move and let us Midwesterners know when you get ready to ride the area.